Overhang Rotatable Multi-Sensory Device and a Virtual Reality Multi-Sensory System Comprising the Same

1. A virtual reality multi-sensory system, comprising an overhang rotatable multi-sensory device installed above a user, a head-mounted multi-sensory device, and a remote control wirelessly connected to the overhang rotatable multi-sensory device and the head-mounted multi-sensory device, wherein the overhang rotatable multi-sensory device comprises: a fixed base, comprising a hanging portion and a base portion, the hanging portion configured to be disposed on a ceiling, underneath a roof or a beam, or an indoor place above a head of the user, the hanging portion having a plurality of support legs at a bottom of the hanging portion, a bottom of each of the support legs secured onto a top of the base portion; a rotatable base rotatably disposed on the fixed base; a control unit disposed within the rotatable base or the fixed base; a driving device disposed between the fixed base and the rotatable base, electrically connected with the control unit, and controlled by the control unit to drive the rotatable base to rotate with respect to the fixed base; and a multi-sensory module including a wind module, a hot air module, a heat module and a liquid mist module, wherein, the wind module is disposed on the rotatable base, electrically connected with the control unit, and controlled by the control unit to generate winds with varied volumes; the hot air module is disposed on the rotatable base, electrically connected with the control unit, and controlled by the control unit to generate winds with varied volumes and varied temperatures; the heat module is disposed on the rotatable base, electrically connected with the control unit, and controlled by the control unit to generate radiation with varied temperatures; and the liquid mist module is disposed on the rotatable base, electrically connected with the control unit, and controlled by the control unit to spray liquid with varied amounts and/or mist with varied drop sizes, wherein, the winds generated by the wind module, the winds generated by the hot air module, the radiation generated by the heat module, and the liquid sprayed by the liquid mist module are individually directed downward to the user wherein the head-mounted multi-sensory device comprises: a helmet; a display screen disposed at a front side of the helmet to display a scene image of a specific environment selected by the user; two earphones each disposed at a lateral side of the helmet to play a scene sound effect of the specific environment selected by the user; and a positioning module disposed within the helmet and connected with the control unit of the overhang rotatable multi-sensory device via wireless communication protocol, to locate a real-time coordinate of a position of the user and transfer the real-time coordinate to the control unit of the overhang rotatable multi-sensory device; wherein, by utilizing the real-time coordinate, the control unit of the overhang rotatable multi-sensory device controls the driving device to drive the rotatable base to rotate with respect to the fixed base, such that at least one of the wind module, the hot air module, the heat module and the liquid mist module is continuously operated facing the user, wherein the remote control is connected with the control unit, the display screen, the two earphones and the air flow guiding module via wireless communication protocol, wherein the user uses the remote control to switch for the specific environment comprising a desert, a snow field, a snowing mountain, a cherry blossom forest, a maple forest and a beachside, and wherein the display screen shows a simulated anywhere door for the user to pass, and the scene image is switched to the desert, the snow field, the snowing mountain, the cherry blossom forest, the maple forest or the beachside in collocation with the wind module, the hot air module, the heat module and the liquid mist module.

2. The virtual reality multi-sensory system according to claim 1 , wherein the rotatable base is provided with a plurality of installing recesses at its external side, the installing recesses are spaced apart from each other; and the wind module, the hot air module, the heat module and the liquid mist module are individually disposed in the installing recesses.

3. The virtual reality multi-sensory system according to claim 2 , wherein the wind module includes a fan base and a fan; the fan base is disposed in one of the installing recesses; the fan of the wind module is pivotally disposed on the fan base, rotatable up and down with respect to the fan base, and electrically connected with the control unit, and the fan of the wind module includes a plurality of blades; and the control unit controls rotation angle of the fan and rotation speed of the blades of the wind module, to generate winds with varied angles and volumes.

4. The virtual reality multi-sensory system according to claim 2 , wherein the hot air module includes a hot air base, a fan and a heater; the hot air base is disposed in one of the installing recesses; the fan of the hot air module is pivotally disposed on the hot air base, rotatable up and down with respect to the hot air base, and electrically connected with the control unit, and the fan of the hot air module includes a plurality of blades; the heater is disposed at an outlet of the fan of the hot air module and electrically connected with the control unit; and the control unit controls rotation angle of the fan and rotation speed of the blades of the hot air module and heating temperature of the heater, to generate winds with varied angles, volumes and temperatures.

5. The virtual reality multi-sensory system according to claim 2 , wherein the heat module includes a heating base and a heat source; the heating base is disposed in one of the installing recesses; the heat source is pivotally disposed on the heating base, rotatable up and down with respect to the heating base, and electrically connected with the control unit; and the control unit controls rotation angle and temperature of the heat source, to generate radiation with varied angles and temperatures.

6. The virtual reality multi-sensory system according to claim 2 , wherein the liquid mist module includes a liquid tank, a sprinkler and an atomizer; the liquid tank contains liquid; the sprinkler and the atomizer are individually connected to the liquid tank and electrically connected with the control unit; and the control unit controls the sprinkler to apply pressure on the liquid in the liquid tank and spray the liquid with varied amounts outward, and the control unit controls the atomizer to atomize the liquid in the liquid tank and spray mist with varied drop sizes outward.

7. The virtual reality multi-sensory system according to claim 6 , wherein the sprinkler and the atomizer are each provided with a liquid outlet opening downward; the liquid mist module further includes a plurality of mist guiding blades pivotally disposed at the liquid outlet of the atomizer, rotatable with respect to the atomizer in the directions toward and away from a central axis of the rotatable base, and electrically connected with the control unit; and the control unit controls rotation angle of the mist guiding blades, to guide a flowing direction of the mist.

8. The virtual reality multi-sensory system according to claim 1 , wherein the fixed base includes a hanging portion and a base portion; the hanging portion has a plurality of support legs at its bottom, bottom ends of the support legs are secured on top of the base portion; the rotatable base is disposed to surround an external side of the base portion of the fixed base and has a ring gear on a top end thereof; the driving device includes a motor, a speed reducer, a drive shaft, and a planetary gear set; the motor is disposed on the base portion and electrically connected with the control unit; the speed reducer is disposed on the base portion and combined to an output shaft of the motor; the planetary gear set includes a sun gear and a planet gear; the drive shaft is combined with the speed reducer and penetrates through a central axis of the sun gear; the planet gear is engaged with the sun gear and the ring gear; the control unit controls the output shaft of the motor to rotate and transmit dynamic power to the drive shaft after the output shaft of the motor is decelerated by the speed reducer; and the drive shaft drives the sun gear to rotate, the sun gear drives the planet gear to rotate, and then the planet gear drives the rotatable base to rotate via the ring gear.

9. The virtual reality multi-sensory system according to claim 1 , wherein the head-mounted multi-sensory device further includes an air flow guiding module, the air flow guiding module includes an air purifier and two flow guiding fans; the air purifier is disposed in the middle of the front side at a bottom of the helmet; the two flow guiding fans are disposed at the bottom of the front side of the helmet and each is located at a lateral side of the air purifier; the two flow guiding fans guide liquid vapor and/or mist vapor mixed by the liquid and/or the mist sprayed from the liquid mist module and an external air to a nose of the user, thereby generating an olfactory feedback; after the overhang rotatable multi-sensory device, the display screen and the two earphones complete simulating the specific environment, the two flow guiding fans guide the external air through the air purifier for purifying, to remove a smell simulated in a space and provide clean air to the nose of the user, thereby preventing the smell of a previous space from remaining and mixing with that of a new space.